The MoorGuard LineSaver fuse design is designed to release at the lowest possible energy level offering the safest anti-snapback fuse.

Linesaver - components annotated

The LineSaver fuse is assembled from two components. First is a trigger, a rope or endless sling, made from high modulus fibers with a break strength matched to the safe working load of the paired mooring line. The trigger is designed to break exactly at the specified load.

On break the energy from the tensioned mooring line and tail are immediately transferred to an elastic component fabricated entirely from AkTiv fiber.

Linesaver - components assembled annotated


The elastic component captures the two lines and anchors them together preventing snapback as it stretches and dissipates the stored energy until it reaches the MEL. The elastic component of the fuse is not designed to hold the load at the SWL but rather a level significantly below the SWL.


In port, a line with an activated fuse can be doubled or replaced without risking a severe castaway situation. The elastic component is sized just large enough to capture and dissipate the line energy. As the chart to the left shows, at activation the energy in the stretched line is imparted to the elastic component that captures and slowly dissipates the dangerous energy.

Linesaver - 150 ton component graphic


The components of a 150 Ton Linesaver fuse. The Trigger is rated at 50 Tons.


Click the image watch video of 20 Ton LineSaver fuse.


The minimum overall length of the fuse is determined by the elongation of the fuse required to dissipate the recoil of the rope system. With the low elongation of high modulus lines and the relative shortness of mooring tails most fuses will be no longer than one meter. A one meter fuse will elongate to eight meters before collapse. A typical mooring system will not have more that one and a half to three meters of total elongation.